Polemonium caeruleum, known as Jacob's-ladder or Greek valerian, is a hardy perennial flowering plant. The plant produces cup-shaped, blue or white flowers...

those in Eurasia, many of which have been synonymized with Polemonium caeruleum. Polemonium are perennial plants (rarely annual plants) growing 10–120 cm...

grazed north-facing slopes of dales are a national stronghold of Polemonium caeruleum (Jacob's ladder), the county flower of Derbyshire. The largest towns...

rock face with small subsidiary colonies nearby. Jacob's-ladder (Polemonium caeruleum), a rarish species characteristic of limestone dales in the White...

(Filipendula ulmaria) and sometimes the uncommon Greek valerian (Polemonium caeruleum). Most willowherbs will not tolerate shade trees and thus are limited...

nutcracker Sika deer Siberian dwarf pine Callianthemum hondoense Polemonium caeruleum Englishman Walter Weston introduced the Western world to the Japanese...

2002, the county flower for Derbyshire has been Jacob's-ladder (Polemonium caeruleum), a relatively rare species, and characteristic of certain limestone...

Parnassia palustris native Sutherland Derbyshire Jacob's-ladder Polemonium caeruleum native Devon primrose Primula vulgaris native Dorset Dorset heath...

Flowers (June 23) Compound leaf (June 23) Polemonium vanbruntiae is similar to P. caeruleum and P. reptans. Polemonium vanbruntiae was described and named by...

common name for several plants and may refer to: Polemonium caeruleum, native to Europe Polemonium reptans, native to North America This page is an index...